To stop dog barking in the garden, understanding why they bark in the first place is essential. Barking occurs for a variety of reasons, to warn, to guard, to communicate, and to protect. Once you can identify why your dog is barking, you will be better equipped to train them not to. Take some time to work out what triggers your dog's barking, and which training technique, or combination of techniques, will work best for him. Positive Reinforcement – this works by giving praise when he is quiet so that we are rewarding the good behaviour, rather than responding to the bad behaviour. Go out in the garden, praise him when he is quiet. Provide Mental and Physical Stimulation – does your dog get enough exercise and engagement, a well-exercised dog will be more likely to curl up and go to sleep, than bark. Identify Triggers and Remove Stimuli – pay attention to what triggers your dog, if next door always lets their yappy dog out at 10 pm, and your dog reacts, why not just put your dog out at a different time. Environmental Management Strategies can also help, reduce any triggers where possible, if your fencing has gaps where your dog can see other animals next door, then block these.